一款功能强大的星盘软件。如果你对天文感兴趣，它会帮助你绘制出来逼真的行星运行轨迹。它包含了丰富的计算和绘图工具，尺寸还是比较精确的。
Shadows Pro is a software package for designing sundials and astrolabes, developed by a French amateur astronomer François Blateyron. Shadows allows you to easily create a sundial customized for your location and then to build it thanks to printouts to scale. Shadows is free in its base level. It is used by thousands of users around the world. Discover the world of sundials on this web site through educational pages and photo galleries…………
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